SSH commands

gistfile1.txt

PUSH:

   * tar cvf - . | gzip -c -1 | ssh user@host cat ">" remotefile.gz

   * ssh target_address cat <localfile ">" remotefile

   * ssh target_address cat <localfile - ">" remotefile

   * cat localfile | ssh target_address cat ">" remotefile

   * cat localfile | ssh target_address cat - ">" remotefile

   * dd if=localfile | ssh target_address dd of=remotefile

   * ssh target_address cat <localfile "|" dd of=remotefile

   * ssh target_address cat - <localfile "|" dd of=remotefile

   * ( cd SOURCEDIR && tar cf - . ) | ssh target_address "(cd DESTDIR && tar xvpf - )"

   * ( cd SOURCEDIR && tar cvf - . ) | ssh target_address "(cd DESTDIR && cat - > remotefile.tar )"

   * ( cd SOURCEDIR && tar czvf - . ) | ssh target_address "(cd DESTDIR && cat - > remotefile.tgz )"

   * ( cd SOURCEDIR && tar cvf - . | gzip -1 -) | ssh target_address "(cd DESTDIR && cat - > remotefile.tgz )"

   * ssh target_address "( nc -l -p 9210 > remotefile & )" && cat source-file | gzip -1 - | nc target_address 9210

   * cat localfile | gzip -1 - | ssh target_address cat ">" remotefile.gz


PULL:

   * ssh target_address cat remotefile > localfile

   * ssh target_address dd if=remotefile | dd of=localfile

   * ssh target_address cat "<" remotefile >localfile

   * ssh target_address cat "<" remotefile.gz | gunzip >localfile

COMPARE:

This one uses CPU cycles on the remote server to compare the files:

   * ssh target_address cat remotefile | diff - localfile

   * cat localfile | ssh target_address diff - remotefile

This one uses CPU cycles on the local server to compare the files:

   * ssh target_address cat <localfile "|" diff - remotefile

Explanation of &&, ||, and -

   * && is shorthand for "if true then do"

   * || is shorthand for "if false then do"

These can be used separately or together as needed. The following examples will attempt
to change directory to "/tmp/mydir"; you will get different results based on whether "/tmp/mydir" exists or not.

   * cd /tmp/mydir && echo was able to change directory

   * cd /tmp/mydir || echo was not able to change directory

   * cd /tmp/mydir && echo was able to change directory || echo was not able to change to directory

   * cd /tmp/mydir && echo success || echo failure

   * cd /tmp/mydir && echo success || { echo failure; exit; }


The dash "-" is used to reference either standard input or standard output. The context in which the dash is used is what determines whether it references standard input or standard output.